The Torque Amp adds an additional 10-30% (adjustable) more horsepower over stock engines. The Torque Amp fits on 1996 and newer 7.6L and 8.1L John Deere engines. The Torque Amp installs on the right hand side of the engine by locating the plug that is pointed down off of the common rail on the engine. It plugs inline with the fuel injection pump and only takes about a minute for complete installation.

Fits John Deere Models:
8120
8220
8320
8420
8520

We are not an authorized Bully Dog dealer. All sales are old stock and all warranty claims will have to go through bully dog.